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If they are added they are just another key in the hashmap, no harm. If they are removed, I don't have a solution for that. Typically you don't remove columns o
by willcipriano 5y ago
If they are added they are just another key in the hashmap, no harm. If they are removed, I don't have a solution for that. Typically you don't remove columns of databases like that, but adding them is common.